code: def memoflag(self) -> Optional[str]:
      # memoflag: '(' "memo" ')'
      mark = self._mark()
      if (
          (literal := self.expect("("))
          and (literal_1 := self.expect("memo"))
          and (literal_2 := self.expect(")"))
      ):
          return "memo"
      self._reset(mark)
      return None
  
imports: import ast
  import sys
  import tokenize
  from typing import Any, Optional
  from pegen.parser import memoize, memoize_left_rec, logger, Parser
  from ast import literal_eval
  from pegen.grammar import Alt, Cut, Forced, Gather, Group, Item, Lookahead, LookaheadOrCut, MetaTuple, MetaList, NameLeaf, NamedItem, NamedItemList, NegativeLookahead, Opt, Plain, PositiveLookahead, Repeat0, Repeat1, Rhs, Rule, RuleList, RuleName, Grammar, StringLeaf
label_desc: Use image node_id 8 for calling the GeneratedParser obj's underlying member method code with example usage: obj.memoflag() and returns: None, str